If you answer 42x42,the answer is
1 764 arrays.
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Not counting rotations, there are 4.
You can make five arrays from the number 48
You cannot sort arrays by other arrays; that wouldn't make sense, anyway.
To calculate the number of arrays that can be made out of 20 elements, we need to consider the possible combinations. Each element can either be included or excluded in the array, resulting in 2 choices for each element. Therefore, the total number of arrays that can be formed is 2^20, which equals 1,048,576.
42